Warp stop-motion for looms.



Patented NOV. 3, 1908.

. F. E. WARP STOP MOTION FOR LO0Ms APPLIOATION FILED JULY 27,1907.

/f ATTORNEYS.

RS c0, WASHINGTON. D- e.

F..E. KIP.

WARP STOP MOTION FOR LOOMS.

' v APPLICATION TILED JULY 27, 1907. 902,741

Patented NOV. 3, 1908.

3 SHEETS-SHEET 2.

INVENTUR fitu/m WITNESSES:

M ATTORNEYS.

F. E. KIP.

WARP STOPIMOTION FOR LOOMS.

APPLIQATION FILED JULY 27,1991

Patented Nov. 3, 1908.

8 SHEETS-SHEET 3.

INVENTOR M 5 WITNESSES ATTORNEYS PETERS co wasnmanm, n. c.

FREDERIG E. KIP, OF MONTOLAIR, NEW JERSEY.

WARP STOP-MOTION FOR LOOMS.

Specification of Letters Patent.

Patented Nov. 3, 1908.

Application filed. July 2'7, 1907. Serial No. 385,780.

To all whom it may concern:

Be it known that I, FREDERIC E. KIP, a citizen of the United States, residing at Montclair, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in War Stop-Motions for Looms, of which the fol owing is a specification.

My invention relates to a warp stop motion for looms employing metallic drop devices to close a controlling circuit to set in operation the stopping mechanism, and more particularly to the form and disposition of the terminals of the circuit and the relation of the drops thereto.

Heretofore there has been em loyed a warp stop motion comprising meta he drops adapted to close the controlling circuit through what is termed a compound terminal, the latter consisting of a metallic bar having set into the upper edge and insulated therefrom a metal strip or blade, the said bar and blade constituting the circuit terminals. In such system some form of guide bar is re quired in order that the drops may be properly confined in their falling movement. According to the present invention the circuit terminals instead of being in one structure are made in separate ieces and so disposed that they serve not on y their function as terminals but as guides for the drops.

The invention will be understood by reference to the accompanying drawings in which Figure 1 is a side elevation of a loom showing the application of the present invention thereto; Fig. 2 an enlarged view of a portion of Fig. 1; and Figs. 3 to 12 inclusive illustrate forms of drops and the relation of the circuit terminals thereto.

Similar numerals of reference indicate similar parts in the several views.

Referring to the drawings numeral 1 designates the loom frame; 2 the lay; 3 the lay sword; 4 the crank connection for vibrating the lay; 5 the breast beam; 6 the shipper lever; 7 the warps; 8 the reed; 9 the heddles; 10 the warp beam; and 11 the whip roll. These parts are and may be of the usual construction and arrangement in looms. The shipper lever 6, as usual, occupies a slot in a bracket forming an extension of the breast beam and engages a shoulder during the nor mal running of the loom. When free from said shoulder, a spring shifts said lever to effeet the stoppage of the loom in a wellknown manner.

To set in motion the loom stopping mechanism when a warp thread breaks or becomes unduly slack, a controlling circuit 12 is employed, said circuit including a cut-out switch 13, a magnet 14, and terminal bars, more fully described hereafter. The drop devices are supported by unbroken and properly tensioned warp threads in such a manner as to maintain the circuit 12 open at the drop devices during the normal running of the loom, the circuit being closed by said devices under the conditions above stated.

In order that the invention may be fully understood, I will first describe the relation of the controlling circuit to the loom-stopping mechanism. The electromagnet 14 is conveniently mounted below the breast beam on a bracket secured to the loom frame, and its armature lever 15 is connected by a link or wire rod 16 to one end of a dagger 17. Pivotally supported upon pins or studs in a bracket 18 is a knock-off lever 19 attached at its lower end to the dagger 17 and adapted at its up per end to engage the shipper lever 6. The dagger 17 is normally in such position that upon each beat-up of the lay it will enter an opening in a hunter 20 mounted on the lay or some other vibrating or moving part of the loom, but when the magnet 14 is energized through the closing of the circuit by a fallen drop the dagger 17 will be moved into such position as to be impinged upon by the face of said bunter, thereby moving the knock-oif lever and freeing the shipper lever to stop the loom, as will be readily understood. During the normal running of the loom the circuit is closed through the switch 13 and opened at the terminal bars; that is, during the normal running of the loom the electromagnet 14 is deenergized and the loom thereby prevented from knocking-off. The particular form of stopping mechanism above described I have taken merely by way of illustration, it being understood that the invention is generally applicable to all forms of stop motions which include an electromagnet which is energized upon the falling of a drop to set such mechanism in operation.

In Figs. 3 to 12 I have shown several forms of drops each drop being made of thin sheet metal and oblong in form. They may have one or more elongated slots. The drops of Figs. 4 6-8-9-1O and 11 have a single slot 21, and those illustrated in Figs. 357 and 12 have two slots 22 and 23. In the double slotted form of drop the lower slot may be closed at both ends as in Fig. 5, or

open at one end as in Figs. 3-7 and 12. In the form of Figs. 5 and 12 the warp thread engages the upper end of the lower slot 23. In the form shown in Figs. 3 and 7 the upper end of the lower slot is inclined to provide a throat leading to the thread aperture 24.. In all of the other forms the drops are provided with a thread aperture 25. The open-ended drops may be threaded after the warp is placed in the loom, and the closed drops threaded in the harness room at the same time that the warp is threaded through the reed.

Extending transversely of the warp 7 and through the slots of all of the drops of a series is a terminal contact bar 26 of suitable conductive material which may be square insection, as shown, for example, in Fig. 8, or circular as in Fig. 12. Also passing through the slots of all of the drops of the series is a ....bar 27 of insulating material and into said ..,.and its diameter, as well as the diameter of bar is set a blade 28 of copper or other conductive material, said blade serving as the other terminal of circuit 12. The bar 27 may be square or circular in section, as illustrated,

. constant electrical engagement with the terminal bar 26, and in the normal operation of the loom the drops are held by the warp threads in such osition that there is no contact between t e drops and the terminal blade 28. When, however, a warp thread breaks or becomes unduly slack the falling drop will be arrested by the blade 28 thus closing circuit 12 through magnet 14. and moving the dagger 17 into position to knock off the 100111 in the manner before stated.

The blade 28 may terminate substantially flush with the upper surface of its supporting bar as indicated in Figs. 4-5 and 9, or it may project a short distance above said bar. In the former case the drop will be formed with a downwardly projecting portion 32 adapted to contact with the blade when the drop falls. I do not intend to confine that form of drop to a terminal flush with the sup orting bar but the same may be used witi the blade projecting above the bar as indicated in Fig. 5. The drops not having a projecting ortion as described have the upper end wa of the slot inclined, as shown,

to insure a good contact.

In the double slotted form of drop having the lower slot open the two terminals pass through the upper slot as indicated, for example, in Fig. 3. In the form shown in Fig. 5 the terminal bar 26 may pass through the lower slot 23 and the blade through the upper slot 22.

The circuit terminals may be above the warp as indicated in Figs. 2 and 3, or below as in Fig. 6. The former disposition is preferred as practically all of the lint accumulates below the level of the warpthreads and by having the terminals above any liability to imperfect contact is avoided.

As shown in Fig. 1 I insert a fiat spreader 29 between the whip roll 11 and the drops to form a permanent shed. To separate the latter from the shed produced by the heddles the warp is made to pass between two transverse rods 30 which keep the warp fiat at this point. The presence of the permanent shed is desirable in that it spreads the threads apart vertically except at the point where the drops are situated and this is not of suflicient extent to offer any obstacle to the falling of the drops. If the warp threads are not spread vertically in substantially the manner described the threads are apt to ad here so that if a break occurs at some distance from the drops the broken thread will be sustained by adjacent threads and thus prevent the drop from falling.

The purpose of switch 13 is to save the batteries by opening the circuit as soon as the shipper lever is released as described in the patent to A. A. Johnson No. 778,132, dated December 20, 1904..

What I claim and desire to secure by Letters Patent is 1. A circuit-closing drop for an electrical warp stop motion, of thin metal and having a slot therein, and a projection extending downwardly into said slot from the upper end thereof.

2. The combination with the terminals of the operating circuit of an electrical warp stop motion, of a circuit-closing gravity drop, said drop having a slot therein through which the terminals are adapted to pass, and a projection extending downwardly into said slot and adapted to contact with one of said terminals.

3. The combination with the terminals of the operating circuit of an electrical warp stop motion, of a circuit-closing gravity drop, said drop having a slot therein through which the terminals are adapted to pass, one of said terminals making contact with the drop at the lateral margin of said slot, and a projection extending downwardly into said slot and adapted when the drop falls to contact with the other of said terminals.

1. Awarp stop motion comprising drop devices supported in normal position by unbroken warp threads said drops having a slot therein, a normally open electric circuit adapted to be closed by a fallen drop, termii -nals for said circuit passing through the slots of a series of said drops one of said terminals being in constant electrical engagement with the drops and the other separate from and supported above said first-named terminal in a base of insulating material and adapted to contact with the drop only when the supporting warp thread breaks or becomes unduly slack.

A warp stop motion comprising drop devices supported in normal position by unbroken warp threads said drops having a slot therein, a normally open electric circuit adapted to be closed by a fallen drop, terminals for said circuit passing through the slots of a series of said drops, one of said terminals being in the form of a bar in constant electrical engagement with the drops, and the other terminal consisting of a blade separate from said first-named terminal and sup ported in a base of insulating material and projecting above said base, said blade terminal being adapted to contact with the drop only when the supporting warp thread breaks or becomes unduly slack.

6. A warp stop motion comprising drop devices supported in normal position by unbroken warp threads said drops having a slot therein, a normally open electric circuit adapted to be closed by a fallen drop, terminals for said circuit passing through the slots of a series of said drops one of said terminals being in constant electrical engagement with the drops and the other separate from and su ported above said first-named terminal in a base of insulating material and adapted to contact with the drop only when the supporting warp thread breaks or becomes unduly slack, said terminals being above the warps.

7. The combination with the terminals of the operating circuit of an electrical warp stop motion, of a circuit-closing gravity drop, said drop having a slot therein through which the terminals are adapted to pass, one of said terminals making contact with the drop at the lateral margin of said slot and the other separate therefrom and supported above the first-named terminal in a base of insulating material, said drop having a projection extending into the slot and adapted to contact with the upper of said terminals when the drop falls.

In testimony whereof I have hereunto signed my name in the presence of two subscribing witnesses.

FREDERIO E. KIP.

Witnesses:

ROBERT W. AsHLEY, G. V. GILMORE. 

